Crosshair V, FX8120 and Corsair H100 push/pull. Overclock it to 4.8/4.9ghz and piss on the X6 1090T which is total nonsense nowadays, except for people who already own X6's and can't admit an FX81X0 with a nice overclock will be faster.
People **** on Bulldozers because they aren't twice as fast as Sandy Bridges and sometimes lose clock to clock benchs compared to Phenom II X6 but once they get nicely overclocked, they rule when you wanna go AMD, especially the cheaper FX8120.

You'll always see ******* on the web comparing Thubans with BDs both at 4.2ghz. Except 4.2ghz is what you'll get with the BD without even upping the vcore (provided you don't have some bad chip) whereas you'll mostly struggle to reach that frequency with a Thuban.
By the way, had a 965@4.0ghz in the past, total **** in everyday use compared to my 8120@4.9ghz.

If you want solid (multithreaded especially) performance, great overclocking, go for FX8120/8150 (8150 if you like throwing your cash away for nothing).
If you don't overclock, get a X6 and a lame mobo that will do the trick. People here will applause for you having the same old chip they bought.
If you wanna get better single threaded performance and mostly play CPU limited games with a ****ty graphic card, go for 2500K/2600K.

Have to agree with the above poster. Yeah Bulldozer isn't faster than Sandy Bridge but its still a great processor and you can overclock it higher than a 1090 without even increasing the voltage. It will equal or outperform a 1090 in games and run off and leave it if you put a hefty overclock on it and the extra 2 cores will help out with the heavy lifting when you get a pair of 6950's.

So I vote FX-8120 all the way. I'm fairly confident you'll see one in my sign before too long.

Cause, when you got old tech, you're sometimes jealous (and even ignorant !) and don't want people to get newer and better computer parts than yours. So you give them ****ty advices like getting a 960T or a 1090/1100T because it owns a new CPU (which overclocks MAGICALLY) at default speeds or with ****ty overclock. GET A 8120!

Please, please, I beg you! Get the 2500K, honestly not trying to be a fan boy but these days, AMD can't compete unless you're doing heavily multi-core tasks... If you're set on AMD, FX CPUs are bad, go for the 1090T.

Please, please, I beg you! Get the 2500K, honestly not trying to be a fan boy but these days, AMD can't compete unless you're doing heavily multi-core tasks... If you're set on AMD, FX CPUs are bad, go for the 1090T.

Please, please I beg you, he said he's not going Intel

Get the 8120. It overclocks like a monster and you will have nice performances. Drop to 8GB RAM to save some $ for the 6950